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<?php
/**
* Copyright (c) 2013 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC\Files\Cache;
use \OC\Files\Mount;
use \OC\Files\Filesystem;
class BackgroundWatcher {
static $folderMimetype = null;
static private function getFolderMimetype() {
if (!is_null(self::$folderMimetype)) {
return self::$folderMimetype;
}
$sql = 'SELECT `id` FROM `*PREFIX*mimetypes` WHERE `mimetype` = ?';
$result = \OC_DB::executeAudited($sql, array('httpd/unix-directory'));
$row = $result->fetchRow();
return $row['id'];
}
static private function checkUpdate($id) {
$cacheItem = Cache::getById($id);
if (is_null($cacheItem)) {
return;
}
list($storageId, $internalPath) = $cacheItem;
$mounts = Filesystem::getMountByStorageId($storageId);
if (count($mounts) === 0) {
//if the storage we need isn't mounted on default, try to find a user that has access to the storage
$permissionsCache = new Permissions($storageId);
$users = $permissionsCache->getUsers($id);
if (count($users) === 0) {
return;
}
Filesystem::initMountPoints($users[0]);
$mounts = Filesystem::getMountByStorageId($storageId);
if (count($mounts) === 0) {
return;
}
}
$storage = $mounts[0]->getStorage();
$watcher = new Watcher($storage);
$watcher->checkUpdate($internalPath);
}
/**
* get the next fileid in the cache
*
* @param int $previous
* @param bool $folder
* @return int
*/
static private function getNextFileId($previous, $folder) {
if ($folder) {
$stmt = \OC_DB::prepare('SELECT `fileid` FROM `*PREFIX*filecache` WHERE `fileid` > ? AND `mimetype` = ? ORDER BY `fileid` ASC', 1);
} else {
$stmt = \OC_DB::prepare('SELECT `fileid` FROM `*PREFIX*filecache` WHERE `fileid` > ? AND `mimetype` != ? ORDER BY `fileid` ASC', 1);
}
$result = \OC_DB::executeAudited($stmt, array($previous,self::getFolderMimetype()));
if ($row = $result->fetchRow()) {
return $row['fileid'];
} else {
return 0;
}
}
static public function checkNext() {
// check both 1 file and 1 folder, this way new files are detected quicker because there are less folders than files usually
$previousFile = \OC_Appconfig::getValue('files', 'backgroundwatcher_previous_file', 0);
$previousFolder = \OC_Appconfig::getValue('files', 'backgroundwatcher_previous_folder', 0);
$nextFile = self::getNextFileId($previousFile, false);
$nextFolder = self::getNextFileId($previousFolder, true);
\OC_Appconfig::setValue('files', 'backgroundwatcher_previous_file', $nextFile);
\OC_Appconfig::setValue('files', 'backgroundwatcher_previous_folder', $nextFolder);
if ($nextFile > 0) {
self::checkUpdate($nextFile);
}
if ($nextFolder > 0) {
self::checkUpdate($nextFolder);
}
}
static public function checkAll() {
$previous = 0;
$next = 1;
while ($next != 0) {
$next = self::getNextFileId($previous, true);
self::checkUpdate($next);
}
$previous = 0;
$next = 1;
while ($next != 0) {
$next = self::getNextFileId($previous, false);
self::checkUpdate($next);
}
}
}
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